1 opacities | Definition of opacities

opacity

noun
opacĀ·​iĀ·​ty | \ ō-ˈpa-sə-tē How to pronounce opacity (audio) \
plural opacities

Definition of opacity

1a : obscurity of sense : unintelligibility
b : the quality or state of being mentally obtuse : dullness
2 : the quality or state of a body that makes it impervious to the rays of light broadly : the relative capacity of matter to obstruct the transmission of radiant energy
3 : an opaque spot in a normally transparent structure (such as the lens of the eye)

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Examples of opacity in a Sentence

the opacity of the glass Critics have noted the opacity of her writing style.

Recent Examples on the Web

The incentives will be for opacity, which could mean absolute insecurity. The Atlantic, "The Metamorphosis," 11 July 2019 With the zero percent opacity no one can see through it. Steve Sadin, chicagotribune.com, "Lincolnshire trustees give nod to privacy fencing in the Rivershire subdivision," 8 July 2019 Under the systems of slavery and colonialism, the opacity of paternity came in particularly handy. Margaret Talbot, The New Yorker, "The Paternity Reveal," 24 June 2019 And this depth relates, according to the equations, to the sun’s opacity, and therefore to its metallicity. Quanta Magazine, "What Is the Sun Made Of and When Will It Die?," 5 July 2018 Apple’s infamous opacity around new products means the app makers don’t have many answers yet as to how Apple’s sign in mechanism is going to impact their apps. Lauren Goode, WIRED, "App Makers Are Mixed on ā€˜Sign In With Apple’," 15 June 2019 In times like these, the company’s opacity has taken on an extra cost. Dan Gallagher, WSJ, "Google’s Search Business Needs More Answers," 1 May 2019 But even if the RealImpact system works, its opacity is a real concern which places the potentially valuable details of this public good solely in the hands of a private for-profit company. David Grossman, Popular Mechanics, "AccuWeather Unveils Its Own Hurricane Scale," 14 Jan. 2019 The film is actually about two brinks, one of them clearly defined and the other not, though no less significant for its opacity. Joe Morgenstern, WSJ, "ā€˜The Brink’ Review: In the Mind of a Propagandist," 28 Mar. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'opacity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of opacity

1575, in the meaning defined at sense 1a

History and Etymology for opacity

Middle French opacitƩ shadiness, from Latin opacitat-, opacitas, from opacus shaded, dark

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More Definitions for opacity

opacity

noun

English Language Learners Definition of opacity

: the quality of a material that does not allow light to pass through it : the quality of being opaque
formal : the quality of being difficult to understand or explain

opacity

noun
opacĀ·​iĀ·​ty | \ ō-ˈpas-ət-ē How to pronounce opacity (audio) \
plural opacities

Medical Definition of opacity

1 : the quality or state of a body that makes it impervious to the rays of light broadly : the relative capacity of matter to obstruct by absorption or reflection the transmission of radiant energy (as X-rays, infrared radiation, or sound)
2 : an opaque spot in a normally transparent structure (as the lens of the eye)

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